Some excellent new photos from 8Hussar's photobucket on the Gun Ram at the CWM.
http://s661.photobucket.com/user/8Hussar/library/?sort=2&page=1
Uploaded the turret+gun mount ones to imgur due to photobucket being a royal pain in the arse in general.
Album
https://imgur.com/a/JpHAxql

Taking known dimensions from primary sources on the Ram OP and regular Ram I + II to come up with numbers. Hull height is to the highest point at the turret ring, Turret height is to top of periscope over cupola and top of periscope on turret roof. No idea on actual roof height but you could probably make a rough estimation using the known heights, the photo with the turret removed and the measurements from the suspension. Hull width is the side hull cast in bulges, versions with the door in place are wider still. You can see in the photo how the actual overall width is lower everywhere else on the hull.
Question remains if they had measured to the older style periscopes or the newer taller ones.

Kangaroo with what looks like an engine change or some sort of major mod. exhaust soot on the rear upper plate, and what looks like the two exhausts sticking out of the rear engine deck plate. Only thing I can think of is an engine change to something like the Fords who's exhaust normally comes right out the lower rear plate on the M4A3, so instead of cutting 1.5 inches of steel to make an opening, they just piped it up and out of the engine cover.
Edit: Turns out that exhaust mod was done specifically to Ram towers only it seems, I suppose for clearance issues or wadding requirements?

Same reason the Ram I had the 2 pdr, no tank mounting existed for the 6 pdr. Canada's waiting on the UK who say they are working on it but it's not materializing so they go ahead and design their own. Australia wants the 6 pdr in their tank so they ask Canada for drawings to see how they manged it.

Yes they are nice stowage diagrams, I had paid to have two different 6 pdr mounting part lists scanned at the Aussie archives and they host everything like that after on their site which is nice. Bonus was the stowage stuff included in the papers.
they are nice for layering as well to compare and get a idea on rough slope for the different sections (in front of driver and cupola)

Well those french drawings show 1950 mm for what I assume is just the size of the cut opening on hull top.
Canada had the M4's outside diameter of the turret ring as 2051 mm, the inside diameter of the ring is listed as 1752.6 mm. I can only assume that is being measured from before the ring is installed and then when the ring and all the mounting equipment is installed, it also may be factoring in that 65 mm extra for the bolt down area, but I'm unsure on that.
I don't have many Sherman photos with the turret off showing the turret ring installed so using the Ram as an example. Using 8Haussars photos from the war museum.
Turret ring listed as having a 1832 mm lower outside diameter, and a 1537 mm upper inside diameter. You can see quite well on the third photo just how much space is eaten up by it's turret ring design.

Dolye? or Spielberger or Jentz (all three?) I can't recall which book talk about the Panther's final drive trouble. Particularly on the Jagdpanther as it had more weight on the front and was dying even faster then the regular Panther.
Something like 30-50km? before it gave up the ghost. Towards the end of the war they started to get the heavier duty final drives and transmission/gearboxes the 7-400? that they reported the life increasing to 400-500 km and had yet to have a failure at the point of the report. If I were a betting man I would say very little if any regular panthers ended up getting those as they probably reserved them for the more strained Jagdpanther.
Interesting that the French blueprints show the Panther G with a 90mm hull front and a 70mm lower. Seen the 70mm lower reported numerous times since the allies first started to capture them (up to 75mm in a few cases) but a 90mm glacis plate is the thickest I have ever seen listed (usually 85mm)